{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xc22fbda2d1f2363f231c0fea912d1bd53d7c16147756ee79aa0986d1e0a63062",
    "signature": "0x6191f1dc4c04942d1c8ad6d7d5f27a1628c3d623f03e48c955b470890ac675c37241eaba613503ff614287a1de322d6f65ca203bed7f94dac9fdce3263568ec71c",
    "signer": "0xE63e65FCe7E937986b2f1003a4098d73367d7ae5",
    "userId": "936460557"
  }
}